<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示用户区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"> </el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="acticeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="acticeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="good_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="CateProps" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model.trim="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传到的api地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="hanndleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model.trim="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览区域 -->
    <el-dialog title="图片预览" :visible.sync="previewVisable" width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import $http from '../../utlis/request.js'

export default {
  name: 'Add',
  data() {
    return {
      // 激活项的索引
      acticeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        // 商品所处的分类数组
        goods_cat: [],
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 商品详情描述
        goods_introduce: '',
        // 图片的数组
        pics: [],
        //  参数对象
        attrs: []
      },
      // 表单验证规则对象
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      },
      // 商品分类数据
      catelist: [],
      CateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数组
      manyTableData: [],
      // 静态参数列表数组
      onlyTableData: [],
      //上传的图片URL地址
      uploadURL: `${$http.defaults.baseURL}upload`,
      // 图片上传的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片的地址
      previewPath: '',
      // 控制预览对话框的显示与隐藏
      previewVisable: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取商品分类
    async getCateList() {
      const { data: res } = await $http.get('categories')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.catelist = res.data
    },
    // 级联选择器变化会触发这个函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) this.addForm.goods_cat = []
    },
    // 标签页切换判断
    beforeTabLeave(activeName, oldActionName) {
      // console.log(activeName, oldActionName)
      if (oldActionName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    // tab被选中
    async tabClicked() {
      // 访问的面板
      if (this.acticeIndex === '1') {
        const { data: res } = await $http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.manyTableData = res.data
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
      } else if (this.acticeIndex === '2') {
        const { data: res } = await $http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisable = true
    },
    //处理移除图片操作
    handleRemove(file) {
      //1.获取将要删除的图片路径
      const filePath = file.response.data.temp_path
      // 2.从pics数组中找到这个图片的索引值
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      // 3.调用splice方法将图片信息对象移除
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功的事件
    hanndleSuccess(response) {
      // 拼接得到一个信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息push到pice数组中
      this.addForm.pics.push(picInfo)
    },
    // 添加商品的事件
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写必要的表单项')
        // 执行添加操作
        const form = JSON.parse(JSON.stringify(this.addForm))
        form.goods_cat = form.goods_cat.join(',')
        //  处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          form.attrs.push(newInfo)
        })

        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          form.attrs.push(newInfo)
        })

        // 添加商品的处理函数
        const { data: res } = await $http.post('goods', form)
        console.log(res)
        if (res.meta.status === 400) return this.$message.error('商品名称已被使用过')
        if (res.meta.status !== 201) return this.$message.error(res.meta.msg)
        this.$message.success(res.meta.msg)
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    // 三级选择框的Id
    cateId() {
      if (this.addForm.goods_cat.length === 3) return this.addForm.goods_cat[2]
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
